TY  - BOOK
AU  - Trjitzinsky, W. J.
TI  - Analytic theory of non-linear singular differential equations
T3  - Mémorial des sciences mathématiques
PY  - 1938
IS  - 90
PB  - Gauthier-Villars
UR  - http://www.numdam.org/item/MSM_1938__90__1_0/
LA  - en
ID  - MSM_1938__90__1_0
ER  -